:root{--primary-color:#ff758c;--primary-hover:#ff5e78;--secondary-color:#40e0d0;--card-bg:#ffffffb3;--text-dark:#2d3436;--text-light:#636e72;--border-color:#ffffff80;--shadow:0 8px 32px 0 #1f26871a;--radius:20px;--transition:all .4s ease}[data-theme=dark]{--bg-gradient-1:#0f172a;--bg-gradient-2:#1e1b4b;--card-bg:#1e293bd9;--text-dark:#f8fafc;--text-light:#94a3b8;--border-color:#ffffff1a}[data-theme=dark] .top-navbar{background:#0f172ae6}[data-theme=dark] input[type=date]{color:#f8fafc;background:#0f172acc;border-color:#ffffff26}[data-theme=dark] .baby-size-card{background:linear-gradient(135deg,#1e1b4b,#0f172a)!important}*{box-sizing:border-box;margin:0;padding:0;font-family:Cairo,sans-serif}body{color:var(--text-dark);background:linear-gradient(135deg,#fdfbfb 0%,#ebedee 100%);min-height:100vh;padding-top:70px}[data-theme=dark] body{background:linear-gradient(135deg,#0f172a 0%,#1e1b4b 100%)}.top-navbar{backdrop-filter:blur(10px);border-bottom:1px solid var(--border-color);z-index:1000;background:#ffffffe6;align-items:center;height:70px;display:flex;position:fixed;top:0;left:0;right:0}.nav-container{justify-content:space-between;align-items:center;width:100%;max-width:800px;margin:0 auto;padding:0 20px;display:flex}.logo{color:var(--primary-color);font-size:22px;font-weight:800;text-decoration:none}.nav-links{align-items:center;gap:15px;display:flex}.nav-links a{color:var(--text-dark);font-weight:600;text-decoration:none}.theme-toggle-btn{cursor:pointer;background:0 0;border:none;font-size:20px}.calculator-container{max-width:650px;margin:40px auto;padding:0 20px}header{text-align:center;margin-bottom:35px}header h1{color:var(--text-dark);margin-bottom:10px;font-size:34px;font-weight:800}header p{color:var(--text-light);font-size:16px}.card{border-radius:var(--radius);margin-bottom:25px;padding:25px}.glass{background:var(--card-bg);backdrop-filter:blur(12px);border:1px solid var(--border-color);box-shadow:var(--shadow)}input[type=date]{border:2px solid #0000000d;border-radius:12px;outline:none;width:100%;padding:16px;font-size:16px}.primary-btn{background:linear-gradient(135deg, var(--primary-color), #ff5e78);color:#fff;cursor:pointer;border:none;border-radius:14px;width:100%;padding:18px;font-size:18px;font-weight:800;box-shadow:0 6px 20px #ff758c4d}#loading-state{text-align:center;padding:40px 0}.hidden{display:none!important}.spinner{border:4px solid #ff758c1a;border-top:4px solid var(--primary-color);border-radius:50%;width:50px;height:50px;margin:0 auto 15px;animation:1s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.results-hidden{display:none}.results-visible{animation:.6s forwards slideUp;display:block}@keyframes slideUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}.main-result{background:linear-gradient(135deg, var(--primary-color), #ff5e78);color:#fff;text-align:center}.grid-results{grid-template-columns:1fr 1fr;gap:20px;margin-bottom:25px;display:grid}.circular-progress{width:140px;height:140px;margin:15px auto;position:relative}.circular-progress svg{width:100%;height:100%;transform:rotate(-90deg)}.circular-progress circle{fill:none;stroke-width:8px;stroke-dasharray:283}.circular-progress circle.bg{stroke:#0000000d}.circular-progress circle.progress{stroke:var(--primary-color);stroke-linecap:round;stroke-dashoffset:283px;transition:stroke-dashoffset 1.5s}.progress-value{font-size:24px;font-weight:800;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.timeline{margin-top:30px}.timeline h3{color:var(--text-dark);text-align:center;margin-bottom:20px;font-size:18px}.timeline-list{padding-right:20px;list-style:none;position:relative}.timeline-list:before{content:"";background:#00000014;width:2px;position:absolute;top:10px;bottom:10px;right:9px}.timeline-list li{margin-bottom:20px;padding-right:25px;position:relative}.timeline-marker{border:4px solid var(--secondary-color);z-index:1;background:#fff;border-radius:50%;width:20px;height:20px;position:absolute;top:5px;right:0}.timeline-list li.final .timeline-marker{border-color:var(--primary-color)}.timeline-content h4{color:var(--text-dark);margin-bottom:5px;font-size:16px}.timeline-content p{color:var(--text-light);font-size:15px;font-weight:600}.seo-content h2{color:var(--primary-color);margin-bottom:15px;font-size:22px}.seo-content h3{color:var(--text-dark);margin:20px 0 10px;font-size:18px}.seo-content p{color:var(--text-light);margin-bottom:15px;line-height:1.8}.site-footer{background:var(--card-bg);text-align:center;border-top:1px solid var(--border-color);margin-top:50px;padding:30px 0}.footer-links{flex-wrap:wrap;justify-content:center;gap:20px;margin-bottom:15px;display:flex}.footer-links a{color:var(--text-dark);font-weight:600;text-decoration:none}@media (width<=600px){.grid-results{grid-template-columns:1fr}}@media print{.top-navbar,.input-section,.actions-section,.site-footer,.seo-content{display:none!important}body{background:#fff;padding-top:0}.calculator-container{max-width:100%;box-shadow:none;margin:0}.card{box-shadow:none;break-inside:avoid;border:1px solid #eee}}